function drawVisualization() {
  // Create and populate the data table.
  var data = google.visualization.arrayToDataTable([
    ['Name', 'Height', 'Smokes'],
    ['Tong Ning mu', 174, true],
    ['Huang Ang fa', 523, false],
    ['Teng nu', 86, true]
  ]);

  // Create and draw the visualization.
  new google.visualization.ImageAreaChart(document.getElementById('visualization')).
      draw(data, null);
}
